US PATENT SUBCLASS 411 / 142
.~.~ Key introduced laterally at juncture of surface and substructure


Current as of: June, 1999
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411 /   HD   EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER

81  DF  THREADED FASTENER LOCKED TO A DISCREET STRUCTURE (E.G., PLATE, RAIL, WHEEL) {13}
132  DF  .~ Lock washer-type member located between substructure and bolt head or nut {8}
142.~.~ Key introduced laterally at juncture of surface and substructure


DEFINITION

Classification: 411/142

Key introduced laterally at juncture of surface and substructure:

(under subclass 132) Device wherein the member is in the form of a pin, rod, wedge, etc., and is inserted between, by movement toward and more or less at right angles to the axis of the bolt, the inwardly facing surface of the bolt head or nut and that portion of the substructure which confronts the surface, and further wherein a portion of the pin, etc., lies within the surface and another portion thereof lies within the substructure, thereby serving to key the bolt head, or the nut, to the substructure.

(1) Note. Most commonly, both the surface and the substructure include a provision (e.g., a groove) for receiving their respective portions of the pin, etc.; in some instances, however, at least one of them lacks such a provision, in which event the pin, etc., may be provided with a sharpened, longitudinally extending ridge (e.g., an edge) for forming a channel, notch, etc., as it is being moved into place.